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be a bit more lenient with invalid metadata requests

This commit is contained in:
Arvid Norberg 2015-04-09 04:24:13 +00:00
parent 20aa53953c
commit 06135941f3
1 changed files with 26 additions and 22 deletions
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48
src/ut_metadata.cpp
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@ -78,7 +78,11 @@ namespace libtorrent { namespace
// metadata. If the torrent is greater than 16 MiB,
// we may hit this case (and the client requesting
// doesn't throttle its requests)
max_incoming_requests = 1024
max_incoming_requests = 1024,
metadata_req = 0,
metadata_piece = 1,
metadata_dont_have = 2
};
int div_round_up(int numerator, int denominator)
@ -277,21 +281,15 @@ namespace libtorrent { namespace
char const* metadata = 0;
int metadata_piece_size = 0;
if (m_torrent.valid_metadata())
e["total_size"] = m_tp.get_metadata_size();
if (type == 1)
{
if (piece < 0 || piece >= int(m_tp.get_metadata_size() + 16 * 1024 - 1)/(16*1024))
{
#ifdef TORRENT_LOGGING
m_pc.peer_log("*** UT_METADATA [ invalid piece %d metadata size: %d ]"
, piece, int(m_tp.get_metadata_size()));
#endif
m_pc.disconnect(errors::invalid_metadata_message, op_bittorrent, 2);
return;
}
TORRENT_ASSERT(piece >= 0 && piece < int(m_tp.get_metadata_size() + 16 * 1024 - 1)/(16*1024));
TORRENT_ASSERT(m_pc.associated_torrent().lock()->valid_metadata());
e["total_size"] = m_tp.get_metadata_size();
TORRENT_ASSERT(m_torrent.valid_metadata());
int offset = piece * 16 * 1024;
// unloaded torrents don't have any metadata. Since we're
// about to send the metadata, we need it to be loaded
@ -372,22 +370,28 @@ namespace libtorrent { namespace
switch (type)
{
case 0: // request
case metadata_req:
{
if (!m_torrent.valid_metadata())
if (!m_torrent.valid_metadata()
|| piece < 0 || piece >= int(m_tp.get_metadata_size() + 16 * 1024 - 1)/(16*1024))
{
write_metadata_packet(2, piece);
#ifdef TORRENT_LOGGING
m_pc.peer_log("*** UT_METADATA [ have: %d invalid piece %d metadata size: %d ]"
, int(m_torrent.valid_metadata()), piece
, int(m_tp.get_metadata_size()));
#endif
write_metadata_packet(metadata_dont_have, piece);
return true;
}
if (m_pc.send_buffer_size() < send_buffer_limit)
write_metadata_packet(1, piece);
write_metadata_packet(metadata_piece, piece);
else if (m_incoming_requests.size() < max_incoming_requests)
m_incoming_requests.push_back(piece);
else
write_metadata_packet(2, piece);
write_metadata_packet(metadata_dont_have, piece);
}
break;
case 1: // data
case metadata_piece:
{
std::vector<int>::iterator i = std::find(m_sent_requests.begin()
, m_sent_requests.end(), piece);
@ -408,7 +412,7 @@ namespace libtorrent { namespace
maybe_send_request();
}
break;
case 2: // have no data
case metadata_dont_have:
{
m_request_limit = (std::max)(aux::time_now() + minutes(1), m_request_limit);
std::vector<int>::iterator i = std::find(m_sent_requests.begin()
@ -436,7 +440,7 @@ namespace libtorrent { namespace
{
int piece = m_incoming_requests.front();
m_incoming_requests.erase(m_incoming_requests.begin());
write_metadata_packet(1, piece);
write_metadata_packet(metadata_piece, piece);
}
}
@ -457,7 +461,7 @@ namespace libtorrent { namespace
if (piece == -1) return;
m_sent_requests.push_back(piece);
write_metadata_packet(0, piece);
write_metadata_packet(metadata_req, piece);
}
}